Merriam-Webster, 1989
Buku Referensi
Ochs, Linnea Leedham, author
Prentice-Hall, 1987
Buku Referensi
Herodotus, author
Everyman's Library, 1997
Buku Referensi
Scott-Kilvert, Ian, author
Longmans, Green, 1970
Buku Teks
Regna Darnell dan Frederci W. Gleach
university of Nebraska Press, 2006
Buku Teks